I have 2 KRC2's, one at home and one at my remote. Both have operated
flawlessly, including lots of 500 Watts RTTY contests. I have found
that if I'm going to have RFI problems it always shows up first when
using 500 watts rtty.
One of the KRC2's is hooked to the aux bus from a K3, the other is
hooked to the RS-232 port on a Kenwood TS-590sg, both driving an
Elecraft KPA500 amp.
Gordon - N1MGO
On 1/12/2021 7:00 AM, Victor Rosenthal wrote:
I brought all the connections to the relays the KRC2 operates and its
power supply in via a piece of multiconductor cable, wrapped 10 turns
of it around a #31 toroid and I have since had no problems with 1200
watts to an antenna about 4m above my roof. No special treatment was
need for the connection to the K3.
I may have scraped paint off the enclosure near the screws that hold
the case together when I assembled it. I do that a lot. A Dremel
grinder does a neat job quickly.
73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 12/01/2021 5:04, Jim Brown wrote:
On 1/11/2021 6:29 PM, HP wrote:
Tom - I will give you some unsolicited advice-- The KRC2 was the
worst RFI sucking piece of gear I ever owned.
Simple reason -- it's chock full of Pin One Problems and is
unshielded. Oh, you say, it's a metal chassis. Yes, BUT -- all the
connectors are insulated from the chassis by paint, there's no
connection between pieces of the chassis because junctions are
painted, and so on. Shielding only works if it's continuous, and if
cable shields are bonded to the shielding enclosure at point of entry.
One of the members of our CQP team bought two for W6GJB's contesting
trailer to go along with the W3NQN filters and switch box he also
bought. I spent a several hours scraping paint, making sure all the
cable shields hit the chassis at point of entry, and so on.
One good thing I learned about it -- a single coax between the Aux
Buss and chassis of the K3 and the KRC2 is all it takes for band
decoding. No RFI issues with K3/KPA500/KAT500 to antennas within 50
ft of the operating position.
73, Jim K9YC
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